package com.qinghong.scheduling.config;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtils implements ApplicationContextAware {

    public static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.applicationContext = applicationContext;
    }

    /**
     * 根据Bean的名称去查找一个bean
     */
    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }

    /**
     * 根据类型去spring容器查找bean
     * @param requiredType
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> requiredType) {
        return applicationContext.getBean(requiredType);
    }

    public static <T> T getBean(String name, Class<T> requiredType) {
        return applicationContext.getBean(name, requiredType);
    }

    public static boolean containsBean(String name) {
        return applicationContext.containsBean(name);
    }

    public static boolean isSingleton(String name) {
        return applicationContext.isSingleton(name);
    }

    /**
     * 传入bean的名字，判断bean的类型
     * @param name
     * @return
     */
    public static Class<? extends Object> getType(String name) {
        return applicationContext.getType(name);
    }
}
